Video recording and reproducing apparatus for recording a video signal and an indexing signal

1. A recording and reproducing apparatus for recording a video signal and an indexing signal to separate video signal areas and subcode areas, respectively, of diagonal tracks formed on a tape by a rotating head, said apparatus comprising: tape drive means for driving the tape; an add command generator for generating an add command to add said indexing signal at a requested position; an indexing signal control for setting and resetting said indexing signal; recording means for recording the video signal to the video signal area and the indexing signal, if any, to a subcode area of each track of the tracks; and editing control means for controlling said indexing signal control in response to said add command, such that the tape is rewound past said requested position for a first predetermined length, after which the tape is driven in a forward direction for a second predetermined length shorter than said first predetermined length, the tape then being further driven in the forward direction for a third predetermined length equal to a difference between said first predetermined length and said second predetermined length for recording the tape with the indexing signal, corresponding to a reset state, until the tape reaches said requested position, the tape being further driven in the forward direction for recording the tape with the indexing signal, corresponding to a set state, for a fourth predetermined length, the indexing signal being preserved as long as a leading edge of the indexing signal does not appear within a predetermined distance.

2. A recording and reproducing apparatus as claimed in claim 1, wherein said reset state is recorded immediately before said add command is generated.

3. A recording and reproducing apparatus as claimed in claim 1, further comprising: video signal generator for generating a video signal in frames, each frame having a predetermined length.

4. The recording and reproducing apparatus according to claim 1, wherein said editing control means records said set state at a position on the tape where said add command is generated.

5. The recording and reproducing apparatus according to claim 4, wherein said reset state is recorded for a predetermined period of time before said set state.

6. The recording and reproducing apparatus according to claim 1, wherein said editing control means records said reset state over a predetermined portion of said previous set state.

7. A recording and reproducing apparatus for recording a video signal and an indexing signal to separate video signal areas and subcode areas, respectively, of diagonal tracks formed on a tape by a rotating head, said apparatus comprising: a tape driver that drives the tape; an add command generator that generates an add command to add said indexing signal at a requested position; an indexing signal controller that sets and resets said indexing signal; a recorder that records the video signal to the video signal area and the indexing signal, if any, to a subcode area of each track of the tracks; and an editing controller that controls said indexing signal controller in response to said add command, such that the tape is shifted past said requested position for a first predetermined length, after which the tape is driven in a forward direction for a second predetermined length shorter than said first predetermined length, the tape then being further driven in the forward direction for a third predetermined length equal to a difference between said first predetermined length and said second predetermined length for recording the tape with the indexing signal, corresponding to a reset state, until the tape reaches said requested position, the tape being further driven in the forward direction for recording the tape with the indexing signal, corresponding to a set state, for a fourth predetermined length, the indexing signal being preserved as long as a leading edge of the indexing signal does not appear within a predetermined distance.